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Ask Dr or dentist:
I'll provide 2 links w/ good info - but do have a pro look to be sure it's not something else. Both websites have suggestions for overall care too. I hope they help.
https://healthunlocked.com/lupusuk/posts/148688/topic-of-the-month-february-coping-with-mouth-ulcers
and
http://www.Lupus.Org/resources/15-questions-oral-issues-with-lupus
best wishes!
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A cyst is a structure or mass that consists of a cellular lined sac. It is typically filled with fluid but may be filled with solid material. It can be congenital, traumatic, or acquired. They may develop nearly anywhere in the body and usually require complete excision for eradication or they are likely to recur. Fluid filled sacs that are not cellular lined may be called pseudo-cysts.
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Most likely acne:
Given your history and the fact that the lip lesion has a white head this is most probably acne. Cold sores usually present on the lips during times of stress and appear more crusted almost like a common scab.
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